材料期刊网

Microstructure of nano precursors of La-Mg hydrogen storage alloy synthesized by sol-gel technology at different pH values

WANG Dahui , XIA Jihong , ZHANG Sha

稀有金属（英文版） doi:10.1007/s12598-012-0540-5

关键词:

水杨羟肟酸功能化聚合物/硅胶螯合吸附材料SHA-PHEMA/SiO2的制备及吸附性能

史小慧 , 王蕊欣 , 高保娇 , 雷彩萍 , 李艳华

高分子材料科学与工程

首先采用氯甲基化试剂1,4-二氯甲氧基丁烷对水杨羟肟酸(SHA)实施氯甲基化反应,制得氯甲基化水杨羟肟酸(CMSHA);然后以聚甲基丙烯酸羟乙酯(PHEMA)改性的硅胶微粒PHEMA/SiO2为载体,使其表面的醇羟基与CMSHA上的氯甲基基团发生亲向取代反应,制得水杨羟肟酸功能化的复合螯合吸附材料(SHA-PHEMA/SiO2).考察了取代反应的主要影响因素;并研究了SHA-PHEMA/SiO2对重金属离子的螯合性能.结果表明,CMSHA与PHEMA/SiO2之间的取代反应遵循单分子取代反应(SNl)的机理;较高温度下,强极性溶剂有利于反应的进行.SHA-PHEMA/SiO2对不同重金属离子表现出不同的螯合吸附能力,摩尔吸附容量的顺序为Cu2+＞ Zn2+ ＞Cd2+＞ Pb2+;SHA-PHEMA/SiO2对Cu2+离子的吸附动力学符合伪二级速率方程;其吸附行为同时遵循Freundlich和Langmuir模式.

关键词: 水杨羟肟酸 , 聚甲基丙烯酸羟乙酯 , 硅胶 , 亲核取代反应 , 螯合吸附

Jian ZHANG/Langhong Lou

材料科学技术（英文）

关键词:

SHA-less architecture with enhanced accuracy for pipelined ADC

赵磊 , 杨银堂 , 朱樟明 , 刘帘羲

半导体学报（英文版） doi:10.1088/1674-4926/33/2/025010

关键词:

固载化羟肟酸过渡金属配合物催化氧化乙苯的性能

王蕊欣 , 雷彩萍 , 史小慧 , 王洪静

功能材料 doi:10.3969/j.issn.1001-9731.2016.02.049

采用付-克烷基化反应,使水杨羟肟酸(SHA)键合到氯甲基化聚苯乙烯微球(CMCPS)表面,制得SHA功能化聚苯乙烯微球(SHA/CPS);再以SHA/CPS为配体,与过渡金属离子M(Co(Ⅱ)、Cu(Ⅱ)、Fe(Ⅲ)、Mn(Ⅱ))配位,制备了M-SHA/CPS配合物固体催化剂.研究了M-SHA/CPS在氧气非均相氧化乙苯中的催化行为.结果表明,M-SHA/CPS可有效地催化分子氧氧化乙苯.中心金属离子的电子结构对配合物催化性能有较大影响,其中Fe-SHA/CPS对乙苯氧化为EBHP的催化活性和选择性最高,在100℃下EBHP的含量高达14％.催化剂浓度、助剂四甘醇浓度和温度对Fe-SHA/CPS催化剂的活性和选择性有较大影响.此外,Fe-SHA/CPS具有较好的重复使用性.

关键词: 水杨羟肟酸过渡金属配合物 , 交联聚苯乙烯微球 , 固载 , 催化氧化 , 乙苯

Ion sputter erosion in metallic glass-A response to "Comment on: Homogeneity of Zr(64.13)Cu(15.75)Ni(10.12)Al(10) bulk metallic glass" by L-Y. Chen, Y-W. Zeng, Q-P. Cao, B-J. Park, Y-M. Chen, K. Hono, U. Vainio, Z-L. Zhang, U. Kaiser, X-D. Wang, and J-Z Jiang J. Mater. Res. 24, 3116 (2009)

Journal of Materials Research

The morphology of the dark and bright regions observed by transmission electron microscopy for the Zr(64.13)Cu(15.75)Ni(10.12)Al(10) bulk metallic glass strongly depends on the ion beam parameters used for ion milling. This indicates that the ion beam could introduce surface fluctuation to metallic glasses during ion milling.

关键词: room-temperature

不同表面处理方法对环氧胶接接头老化性能的影响

高岩磊 , 崔文广 , 熊金平

腐蚀学报（英文） doi:10.3969/j.issn.1002-6495.2009.04.017

选用了LY12CZ铝合金和TA2钛合金两种基体,分别采用了两种不同的表面处理方法对其进行表面处理:砂纸打磨、磷酸阳极化(PAA)和砂纸打磨、阳极化(SHA);研究了不同表面处理方法对Al/Al环氧胶接接头、Ti/Ti环氧胶接接头老化性能的影响,结果表明,与砂纸打磨法相比PAA和SHA表面处理法能显著提高环氧胶接接头在介质中的老化性能,尤其是在低温介质中的耐久性.

关键词: 表面处理 , 环氧胶接接头 , 耐久性

Broer-Kaup-Kupershmidt方程的新精确解

杨立娟 , 杨琼芬 , 杜先云

量子电子学报 doi:10.3969/j.issn.1007-5461.2012.02.003

CK方法是求解非线性发展方程的一种有效的直接方法.利用推广的CK方法,求得(2+1)维Broer-Kaup-Kupershmidt方程的Backlund公式,从而获得方程的大量新的精确解,推广了Xu和Zhang的结果.

关键词: 非线性发展方程 , Broer-Kaup-Kupershmidt方程 , 精确解 , CK方法 , Backlund变换

Three-dimensional (3D) Ising universality in magnets and critical indices at fluid-fluid phase transition

Phase Transitions

Experimental data for critical exponents in some magnetic materials are compared with recent theoretical results on the three-dimensional (3D) Ising model, as derived by one of us (ZDZ) based on two conjectures [Z.D. Zhang, Conjectures on the exact solution of three-dimensional (3D) simple orthorhombic Ising lattices, Phil. Mag. 87 (2007), pp. 5309-5419]. It is found that critical exponents in some bulk magnetic materials indeed form a 3D Ising universality. Our attention is then focused on the critical indices at fluid-fluid phase transition. We suggest to use Zhang's exponent = 3/8 to fit the experimental data over the wider asymptotic region near the critical point of a fluid-fluid phase transition. The 3D Ising universality should exist for critical indices in a certain class of magnets and at fluid-fluid phase transition.

关键词: magnetically ordered materials;fluid-fluid;phase transitions;order-disorder effects;ferromagnetic curie temperature;liquid critical phenomena;x-ray-scattering;critical exponents;critical-point;coexistence;curves;binary-solutions;ionic-solutions;behavior;equation

Response to the Comment on 'Conjectures on exact solution of three-dimensional (3D) simple orthorhombic Ising lattices'

Philosophical Magazine

The error of Equation (15b) in my article [Z.D. Zhang, Phil. Mag. 87 (2007) p.5309] in the application of the Jordan-Wigner transformation does not affect the validity of the putative exact solution, since the solution is not derived directly from that equation. Other objections of Perk's comment [J.H.H. Perk, Phil. Mag. 89 (2009) p.761] are the same as those in Wu et al.'s comments [F.Y. Wu et al., Phil. Mag. 88 (2008) p.3093; p.3103], which do not stand on solid ground and which I have sought to refute in my previous response [Z.D. Zhang, Phil. Mag. 88 (2008) p.3097]. The conjectured solution can be utilized to understand critical phenomena in various systems, whereas the conjectures are open to rigorous proof.

关键词: 3D Ising model;exact solution;conjecture;critical phenomena;ferromagnetism;magnetic phase transition;model;analyticity